Plymouth, Montserrat
Located in an overseas territory of the United Kingdom, the island of Montserrat, Plymouth was once a capital city. It was built on historical lava deposits near the Soufrière Hills volcano, that was then thought to be long-inactive. In 1995, the volcano resumed erupting, forcing people of Plymouth and surrounding areas to evacuate. It was completely abandoned 2 years later after the city was mostly destroyed by fire and covered in dust and debris. As volcanic activity continued, the entire southern half of the island was declared an exclusion zone. Despite being abandoned and in the exclusion zone, Plymouth still remains the de jure capital city of Montserrat which makes it the only ghost town that serves as the capital of a political territory.